These warnings occur in the process of creating lots of symlinks before system hangs (well, this time I was luckier and system didn't hang..) I checked: when system hanged, it was always the same offset in the same function. I failed to get more good traces. I send the best I got. After lots of attempts I passed the usual hanging step.. With lots of warnings I already mentioned.
[ 190.218701] ------------[ cut here ]------------ [ 190.218770] WARNING: at fs/btrfs/inode.c:3116 inode_tree_add+0xd0/0x162 [btrfs]() [ 190.218774] Hardware name: X51RL [ 190.218776] Modules linked in: raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 snd_pcm_oss snd_mixer_oss raid0 af_packet md_mod ipv6 ipip tunnel4 radeon drm snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc atiixp ftdi_sio usbserial loop ati_agp agpgart p4_clockmod speedstep_lib 8139too mii kqemu fuse thermal thermal_sys hwmon ac battery asus_laptop backlight led_class tun usb_storage usb_libusual dm_mod ide_generic ide_gd_mod ide_cd_mod ide_core sr_mod cdrom pata_marvell ata_piix sata_uli sata_sis pata_sis sata_via sata_nv ahci fbdev xtkbd atkbd ohci_hcd ssb pcmcia pcmcia_core firmware_class ehci_hcd uhci_hcd usbhid hid usbcore unix btrfs zlib_deflate libcrc32c crc32c libata sd_mod scsi_mod crc_t10dif jfs nls_base xfs exportfs ext3 jbd mbcache synaptics_i2c i2c_core sermouse psmouse libps2 pcips2 i8042 serio evdev mousedev [ 190.218882] Pid: 4675, comm: perl Not tainted 2.6.31-rc3 #1 [ 190.218885] Call Trace: [ 190.218928] [<f8c17117>] ? inode_tree_add+0xd0/0x162 [btrfs] [ 190.218937] [<c1062acd>] warn_slowpath_common+0xe0/0x148 [ 190.218942] [<c1062b5e>] warn_slowpath_null+0x29/0x3a [ 190.218985] [<f8c17117>] inode_tree_add+0xd0/0x162 [btrfs] [ 190.219027] [<f8c1d936>] btrfs_iget+0x6cb/0x6f8 [btrfs] [ 190.219034] [<c103e22d>] ? kmap_atomic+0x22/0x32 [ 190.219077] [<f8c1dbeb>] btrfs_lookup_dentry+0x288/0x2d1 [btrfs] [ 190.219120] [<f8c1dc6b>] btrfs_lookup+0x37/0x82 [btrfs] [ 190.219137] [<c1182ebb>] do_lookup+0x153/0x2cb [ 190.219142] [<c11847fe>] __link_path_walk+0xcf8/0xf61 [ 190.219147] [<c1185599>] path_walk+0xb4/0x19b [ 190.219152] [<c118787b>] do_path_lookup+0x4f/0x193 [ 190.219157] [<c118a06b>] user_path_at+0x94/0xe4 [ 190.219165] [<c117b499>] vfs_fstatat+0x5f/0xc0 [ 190.219170] [<c117b586>] vfs_lstat+0x24/0x34 [ 190.219175] [<c117b5b8>] sys_lstat64+0x22/0x60 [ 190.219182] [<c1005523>] sysenter_do_call+0x12/0x28 [ 190.219186] ---[ end trace ce4ad504bff439c7 ]--- [ 215.132710] ------------[ cut here ]------------ [ 215.132773] WARNING: at fs/btrfs/inode.c:3116 inode_tree_add+0xd0/0x162 [btrfs]() [ 215.132777] Hardware name: X51RL [ 215.132780] Modules linked in: raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 snd_pcm_oss snd_mixer_oss raid0 af_packet md_mod ipv6 ipip tunnel4 radeon drm snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc atiixp ftdi_sio usbserial loop ati_agp agpgart p4_clockmod speedstep_lib 8139too mii kqemu fuse thermal thermal_sys hwmon ac battery asus_laptop backlight led_class tun usb_storage usb_libusual dm_mod ide_generic ide_gd_mod ide_cd_mod ide_core sr_mod cdrom pata_marvell ata_piix sata_uli sata_sis pata_sis sata_via sata_nv ahci fbdev xtkbd atkbd ohci_hcd ssb pcmcia pcmcia_core firmware_class ehci_hcd uhci_hcd usbhid hid usbcore unix btrfs zlib_deflate libcrc32c crc32c libata sd_mod scsi_mod crc_t10dif jfs nls_base xfs exportfs ext3 jbd mbcache synaptics_i2c i2c_core sermouse psmouse libps2 pcips2 i8042 serio evdev mousedev [ 215.132885] Pid: 4675, comm: perl Tainted: G W 2.6.31-rc3 #1 [ 215.132888] Call Trace: [ 215.132929] [<f8c17117>] ? inode_tree_add+0xd0/0x162 [btrfs] [ 215.132939] [<c1062acd>] warn_slowpath_common+0xe0/0x148 [ 215.132945] [<c1062b5e>] warn_slowpath_null+0x29/0x3a [ 215.132986] [<f8c17117>] inode_tree_add+0xd0/0x162 [btrfs] [ 215.133028] [<f8c1d936>] btrfs_iget+0x6cb/0x6f8 [btrfs] [ 215.133035] [<c103e22d>] ? kmap_atomic+0x22/0x32 [ 215.133078] [<f8c1dbeb>] btrfs_lookup_dentry+0x288/0x2d1 [btrfs] [ 215.133120] [<f8c1dc6b>] btrfs_lookup+0x37/0x82 [btrfs] [ 215.133136] [<c1182ebb>] do_lookup+0x153/0x2cb [ 215.133141] [<c11847fe>] __link_path_walk+0xcf8/0xf61 [ 215.133146] [<c1185599>] path_walk+0xb4/0x19b [ 215.133151] [<c118787b>] do_path_lookup+0x4f/0x193 [ 215.133157] [<c118a06b>] user_path_at+0x94/0xe4 [ 215.133164] [<c117b499>] vfs_fstatat+0x5f/0xc0 [ 215.133169] [<c117b586>] vfs_lstat+0x24/0x34 [ 215.133175] [<c117b5b8>] sys_lstat64+0x22/0x60 [ 215.133181] [<c1005523>] sysenter_do_call+0x12/0x28 [ 215.133186] ---[ end trace ce4ad504bff439c8 ]--- [ 216.230921] ------------[ cut here ]------------ [ 216.230988] WARNING: at fs/btrfs/inode.c:3116 inode_tree_add+0xd0/0x162 [btrfs]() [ 216.230992] Hardware name: X51RL [ 216.230995] Modules linked in: raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 snd_pcm_oss snd_mixer_oss raid0 af_packet md_mod ipv6 ipip tunnel4 radeon drm snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc atiixp ftdi_sio usbserial loop ati_agp agpgart p4_clockmod speedstep_lib 8139too mii kqemu fuse thermal thermal_sys hwmon ac battery asus_laptop backlight led_class tun usb_storage usb_libusual dm_mod ide_generic ide_gd_mod ide_cd_mod ide_core sr_mod cdrom pata_marvell ata_piix sata_uli sata_sis pata_sis sata_via sata_nv ahci fbdev xtkbd atkbd ohci_hcd ssb pcmcia pcmcia_core firmware_class ehci_hcd uhci_hcd usbhid hid usbcore unix btrfs zlib_deflate libcrc32c crc32c libata sd_mod scsi_mod crc_t10dif jfs nls_base xfs exportfs ext3 jbd mbcache synaptics_i2c i2c_core sermouse psmouse libps2 pcips2 i8042 serio evdev mousedev [ 216.231101] Pid: 4675, comm: perl Tainted: G W 2.6.31-rc3 #1 [ 216.231104] Call Trace: [ 216.231145] [<f8c17117>] ? inode_tree_add+0xd0/0x162 [btrfs] [ 216.231155] [<c1062acd>] warn_slowpath_common+0xe0/0x148 [ 216.231160] [<c1062b5e>] warn_slowpath_null+0x29/0x3a [ 216.231203] [<f8c17117>] inode_tree_add+0xd0/0x162 [btrfs] [ 216.231245] [<f8c1d936>] btrfs_iget+0x6cb/0x6f8 [btrfs] [ 216.231252] [<c103e22d>] ? kmap_atomic+0x22/0x32 [ 216.231295] [<f8c1dbeb>] btrfs_lookup_dentry+0x288/0x2d1 [btrfs] [ 216.231337] [<f8c1dc6b>] btrfs_lookup+0x37/0x82 [btrfs] [ 216.231354] [<c1182ebb>] do_lookup+0x153/0x2cb [ 216.231359] [<c11847fe>] __link_path_walk+0xcf8/0xf61 [ 216.231365] [<c1185599>] path_walk+0xb4/0x19b [ 216.231370] [<c118787b>] do_path_lookup+0x4f/0x193 [ 216.231375] [<c118a06b>] user_path_at+0x94/0xe4 [ 216.231382] [<c117b499>] vfs_fstatat+0x5f/0xc0 [ 216.231387] [<c117b586>] vfs_lstat+0x24/0x34 [ 216.231392] [<c117b5b8>] sys_lstat64+0x22/0x60 [ 216.231399] [<c1005523>] sysenter_do_call+0x12/0x28 [ 216.231404] ---[ end trace ce4ad504bff439c9 ]--- [ 219.769624] ------------[ cut here ]------------ [ 219.769702] WARNING: at fs/btrfs/inode.c:3116 inode_tree_add+0xd0/0x162 [btrfs]() [ 219.769707] Hardware name: X51RL [ 219.769709] Modules linked in: raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 snd_pcm_oss snd_mixer_oss raid0 af_packet md_mod ipv6 ipip tunnel4 radeon drm snd_hda_codec_si3054 snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc atiixp ftdi_sio usbserial loop ati_agp agpgart p4_clockmod speedstep_lib 8139too mii kqemu fuse thermal thermal_sys hwmon ac battery asus_laptop backlight led_class tun usb_storage usb_libusual dm_mod ide_generic ide_gd_mod ide_cd_mod ide_core sr_mod cdrom pata_marvell ata_piix sata_uli sata_sis pata_sis sata_via sata_nv ahci fbdev xtkbd atkbd ohci_hcd ssb pcmcia pcmcia_core firmware_class ehci_hcd uhci_hcd usbhid hid usbcore unix btrfs zlib_deflate libcrc32c crc32c libata sd_mod scsi_mod crc_t10dif jfs nls_base xfs exportfs ext3 jbd mbcache synaptics_i2c i2c_core sermouse psmouse libps2 pcips2 i8042 serio evdev mousedev [ 219.769846] Pid: 4675, comm: perl Tainted: G W 2.6.31-rc3 #1 [ 219.769850] Call Trace: [ 219.769896] [<f8c17117>] ? inode_tree_add+0xd0/0x162 [btrfs] [ 219.769907] [<c1062acd>] warn_slowpath_common+0xe0/0x148 [ 219.769912] [<c1062b5e>] warn_slowpath_null+0x29/0x3a [ 219.769955] [<f8c17117>] inode_tree_add+0xd0/0x162 [btrfs] [ 219.769997] [<f8c1d936>] btrfs_iget+0x6cb/0x6f8 [btrfs] [ 219.770026] [<c103e22d>] ? kmap_atomic+0x22/0x32 [ 219.770071] [<f8c1dbeb>] btrfs_lookup_dentry+0x288/0x2d1 [btrfs] [ 219.770114] [<f8c1dc6b>] btrfs_lookup+0x37/0x82 [btrfs] [ 219.770131] [<c1182ebb>] do_lookup+0x153/0x2cb [ 219.770136] [<c11847fe>] __link_path_walk+0xcf8/0xf61 [ 219.770141] [<c1185599>] path_walk+0xb4/0x19b [ 219.770146] [<c118787b>] do_path_lookup+0x4f/0x193 [ 219.770151] [<c118a06b>] user_path_at+0x94/0xe4 [ 219.770159] [<c117b499>] vfs_fstatat+0x5f/0xc0 [ 219.770164] [<c117b586>] vfs_lstat+0x24/0x34 [ 219.770169] [<c117b5b8>] sys_lstat64+0x22/0x60 [ 219.770176] [<c1005523>] sysenter_do_call+0x12/0x28 [ 219.770181] ---[ end trace ce4ad504bff439ca ]--- [ 344.554787] usbcore: registered new interface driver usblp [ 345.834544] warning: `named' uses 32-bit capabilities (legacy support in use)
[ 389.505428] BUG: unable to handle kernel NULL pointer dereference at 00000008[ 389.505592] IP: [<c1295e76>] __rb_rotate_left+0x12/0x8c [ 389.505704] *pdpt = 00000000291d1001 *pde = 0000000000000000 [ 389.505855] Oops: 0000 [#1] SMP [ 389.506003] last sysfs file: /sys/class/power_supply/BAT0/energy_full [ 389.508706] [ 389.508706] Pid: 4751, comm: perl Tainted: G W (2.6.31-rc3 #1) X51RL [ 389.508706] EIP: 0060:[<c1295e76>] EFLAGS: 00010282 CPU: 0 [ 389.508706] EIP is at __rb_rotate_left+0x12/0x8c [ 389.508706] EAX: e543e0bc EBX: 00000000 ECX: c103393f EDX: e7de4d64 [ 389.508706] ESI: e543e0bc EDI: f58f7a64 EBP: e95b2d4c ESP: e95b2d40 [ 389.508706] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 389.508706] Process perl (pid: 4751, ti=e95b2000 task=e940a4f0 task.ti=e95b2000) [ 389.508706] Stack:
